Regulation of ethylene biosynthesis by nitric oxide and thidiazuron during postharvest of rose

Abstract

Nitric oxide (NO) and thidiazuron (TDZ) have been shown to extend the postharvest life of a range of flowers possibly by downregulating ethylene production. In this study, we have evaluated the effect of sodium nitroprusside (SNP), a nitric oxide donor and thidiazuron on postharvest senescence of cut Rosa flower. Therefore, we examined the effects of SNP and TDZ on its ethylene production and shelf life. Flowers were treated for 24 h with 0, 20, 40 µmol.L -1 TDZ and 0, 20, 40, 60 µmol L -1 SNP and then held in the solution, 8-HQS at 300 ppm combination with 1% sucrose. Treatment with NO and TDZ delayed the ethylene production and prolonged shelf life. It was observed that, treating with NO and TDZ at a 40 µMol.L -1 concentration and 40 µM.L -1 TDZ with 40 µM.L -1 SNP decreased ethylene production and senescence of floweres. SNP at 60 µMol.L